The $\Lambda \mathrm{CDM}$ Limit of the Generalized Chaplygin Gas Scenario

Abstract

We explicitly demonstrate that, contrary to recent claims, the dynamics of a generalized Chaplygin gas model with an equation of state $p=-C$ (where $C$ is a positive constant) is equivalent to that of a standard $\Lambda$CDM model to first order in the metric perturbations. We further argue that the analogy between the two models goes well beyond linear theory and conclude that they cannot be distinguished based on gravity alone.

arXiv comment6 pages, to appear in JCAP

References in corpus (20)

• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• The Cosmological Constant
• An alternative to quintessence
• Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
• Essentials of k-essence
• Unification of Dark Matter and Dark Energy: the Inhomogeneous Chaplygin Gas
• Cosmology with tachyon field as dark energy
• Can the Chaplygin gas be a plausible model for dark energy?
• Cosmic Concordance and Quintessence
• WMAP and the Generalized Chaplygin Gas
• Constraints on the generalized Chaplygin gas from supernovae observations
• Density perturbations in an Universe dominated by the Chaplygin gas
• Cosmological consequences of a Chaplygin gas dark energy
• Is the Dark Matter a Solid?
• High-redshift objects and the generalized Chaplygin gas
• Alternatives to Quintessence Model Building
• The Role of Baryons in Unified Dark Matter Models
• Mass Power Spectrum in a Universe Dominated by the Chaplygin Gas
• A Supernova Brane Scan
• Supersymmetric Chaplygin gas

Cited by in corpus (45)

• In the Realm of the Hubble tension $-$ a Review of Solutions
• The end of unified dark matter?
• Tachyons, Scalar Fields and Cosmology
• A comparison of cosmological models using recent supernova data
• Interacting Chaplygin gas
• Dark Energy Models in the w - w' Plane
• Aetherizing Lambda: Barotropic Fluids as Dark Energy
• The dark degeneracy and interacting cosmic components
• Exploring the Dark Energy Redshift Desert with the Sandage-Loeb Test
• Matter creation and cosmic acceleration
• Unified Dark Matter Scalar Field Models
• Generalized Chaplygin Gas in a modified gravity approach
• Nonlinear Chaplygin Gas Cosmologies
• Inflation in string-inspired cosmology and suppression of CMB low multipoles
• Effective field description of the Anton-Schmidt cosmic fluid
• Chaplygin gas dominated anisotropic brane world cosmological models
• Does Chaplygin gas have salvation?
• Quantum noise and large-scale cosmic microwave background anisotropy
• Observational constraints of a new unified dark fluid and the $H_0$ tension
• Hyperbolic Universes with a Horned Topology and the CMB Anisotropy
• Observational Constraints on Silent Quartessence
• Viscous dissipative Chaplygin gas dominated homogenous and isotropic cosmological models
• Linear and non-Linear Instabilities in Unified Dark Energy Models
• Extending the generalized Chaplygin gas model by using geometrothermodynamics
• Measuring the Chaplygin gas equation of state from angular and luminosity distances
• Generalized Chaplygin gas as geometrical dark energy
• Holographic bounds on the UV cutoff scale in inflationary cosmology
• Stability of Effective Thin-shell Wormholes Under Lorentz Symmetry Breaking Supported by Dark Matter and Dark Energy
• Clustering Properties of Dynamical Dark Energy Models
• Extended family of generalized Chaplygin gas models
• Lagrangian description of cosmic fluids: mapping dark energy into unified dark energy
• Constraints on the dark matter sound speed from galactic scales: the cases of the Modified and Extended Chaplygin Gas
• Degeneracy between CCDM and $\Lambda$CDM cosmologies
• Combined cosmological tests of a bivalent tachyonic dark energy scalar field model
• Spherical collapse for unified dark matter models
• Is $w\ne -1$ evidence for a dynamical dark energy equation of state ?
• Role of Chaplygin gas as geometrical dark energy in anisotropic brane gravity
• Effect of low anisotropy on cosmological models by using supernova data
• Cosmic expansion from boson and fermion fields
• A new logotropic model based on a complex scalar field with a logarithmic potential
• Cosmological constraints on superconducting dark energy models
• Cosmological models based on a complex scalar field with a power-law potential associated with a polytropic equation of state
• Scalar and vector perturbations in a universe with nonlinear perfect fluid
• Halos of dark energy
• Background dynamics and observational constraints of flat and non-flat $\Lambda (t)$CDM models from $H(z)$ and DESI DR2 BAO measurements